A modified air intake mechanism for an internal combustion engine. The air intake mechanism includes an air passageway that contains a fixed vane located in a plane that is parallel to the air flow within the passageway. More specifically, the vane is stationary and is located in the air horn or the air intake passageway of the cylinder head.
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1. An air intake housing for an internal combustion engine, said housing having a first end and a second end opposite said first end, said housing comprising:
(a) a side wall having an annular inner surface which defines an air intake passageway, an outer opening to said passageway at said first end and an inner opening at said second end, said air intake passageway having a central longitudinal axis; (b) a planar vane fixed to said inner surface and extending along said longitudinal axis, said vane spanning said air intake passageway.
9. An internal combustion engine comprising:
(a) a cylinder head containing a cylinder having a combustion end and a power end and an air intake port at said combustion end; (b) a fuel metering device connected to said cylinder head, said fuel metering device having an inlet opening and an inner air intake passageway operatively connected to said air intake port; (c) an air horn having an annular inner surface which defines an outer air intake passageway, an outer opening to said outer air intake passageway and an inner opening which abuts the inlet opening of said fuel metering device, said outer intake passageway having a central longitudinal axis; and (d) a planar vane fixed to said inner surface and extending along said longitudinal axis, said vane spanning said outer air intake passageway.
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This application claims the benefit under 35 U.S.C. § 119(e) of prior U.S. Provisional Application No. 60/177,771 filed Jan. 24, 2000; which is hereby incorporated by reference.
This invention has been created without the sponsorship or funding of any federally sponsored research or development program.
The present invention is directed to the air intake features of an internal combustion engine. For most internal combustion engines, ambient air is mixed with a vaporized fuel. The air fuel mixture is introduced into the working cylinder portion of the engine. Power can be increased by increasing air flow into the cylinder. One way to increase air flow to an internal combustion engine is to add a "velocity stack" or "air horn" to a carburetor or fuel injector. A "velocity stack" is a generally cone-shaped device that is open to the outside and directs airflow to the air-fuel system. These devices are more commonly used on engines that are intended for extra power including automobile, motorcycle or power boat engines. The velocity stack has a relatively large inlet opening and a relatively small outlet opening. Generally, when a velocity stack is used on an engine, an air filter is not used.
Many engine designs include an adjustable vane in the air horn, air intake port of the cylinder head or both. The vane functions as a valve to control the air flow to accommodate variations in power needs. In one known engine design, the vane in the air intake passageway of the cylinder head is fixed within the passageway. The vane gradually twists so that the cross-section area of the air intake passageway gradually narrows toward the inlet port of the cylinder. Therefore, the primary effect of the vane is to direct the air flow.
Many of the prior art air intake devices that employ vanes restrict air flow in the intake port in such a way that the air flow is biased toward one side of the valve opening and it's velocity is maintained. In each case, a circular air flow is created within the combustion cylinder around the cylinder axis. This increases mixing of the charge in the cylinder for best fuel efficiency. Therefore, the prior art air intake devices which employ a vane increase air turbulence to increase fuel efficiency not power. These and other difficulties experienced with the prior art air horn and cylinder head designs have been obviated by the present invention.
A principle object of the present invention is to provide an air intake system for an internal combustion engine that will produce an increased air flow to the engine and a resulting increase in horsepower.
A further object of the invention is the provision of an air intake system for an internal combustion engine that includes a modification in the path of the air flow leading to the engine.
Another object of the invention is the provision of a vane structure in either the air passageway of the air horn or cylinder head for reducing turbulence and increasing air flow to the cylinder.
In general, the invention consists of a modified air intake mechanism for an internal combustion engine. The air intake mechanism includes an air passageway that contains a fixed vane located in a plane that is parallel to the air flow within the passageway. More specifically, the vane is stationary and is located in the air horn, an air intake passageway of an air horn or the cylinder head.
The character of the invention, however, may be best understood by reference to the accompanying drawings, in which:
Referring to
Referring to
Referring to
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